On the Time variability of gamma-ray sources: A Numerical analysis of variability indices

2001
5 pages
Published in:
  • Astron.Nachr. 322 (2001) 223-227
e-Print:

Citations per year

2001200720132019202302468
Abstract: (arXiv)
We present a Monte Carlo analysis of the recently introduced variability indices τ\tau (Tompkins 1999) and II (Zhang et al. 2000 & Torres et al. 2001) for γ\gamma-ray sources. We explore different variability criteria and prove that these two indices, despite the very different approaches used to compute them, are statistically correlated (5 to 7σ\sigma). This conclusion is maintained also for the subset of AGNs and high latitude (b>10|b|>10 deg) sources, whereas the correlation is lowered for the low latitude ones, where the influence of the diffuse galactic emission background is strong.